Relaxed syntax for JSON

[matyalatte]

Some new rules for gui_definition.json. They will make it easier for users to manage JSON files.

• Allow comments
• Allow an object instead of an array of an object.
• Allow the "gui" object as root.
• Allow trailing commas at the end of objects and arrays.

Allow comments

C-style comments (// ... and /* ... */) improve readability.

{
    /*
    comments
    */
    "gui": [{}]  // comments
}

Allow an object instead of an array of an object.

The array brackets [] (and the indnetation for them) are redundant when it has only one item.

"gui": //[
{
    "label": "no need the array brackets when it has only one item"
}
//]

Allow the "gui" object as root.

The root braces {} and the key gui are redundant when there is only the "gui" object.

// { "gui":
{
    "label": "no need the root braces when there is no other keys."
}
// }

Allow trailing commas at the end of objects and arrays.

When managing json files in git, adding a trailing comma at the end of objects and arrays makes the commit history cleaner.

[
    "need a trailing comma",
    "need a trailing comma",
    "no need a trailing comma but you can put it",
]

[matyalatte]

Comments and trailing commas are supported at #42

[matyalatte]

You can now remove array brackets when it has only one item. (#51)
and you can also move gui elements (e.g. "command") into the root object. (#52)
like this

{
    "minimum_required": "0.8.0",
    // no need for "gui"
    "label": "test",
    "command": "echo hello",
    "components": [],
    // no need for array brakets [] for "help"
    "help": {
        "label": "test",
        "type": "url",
        "url": "example.com",
    },
}